350 HISTORY OF BRITISH ZOOPHYTES. 
that you must examine the fishermen’s nets and boats 
at Newhaven.” Dr. Grant has calculated that a com- 
mon specimen of /, carbasea presents more than 18,000 
polypi, 396,000 tentacula, and 39,600,000 cilia on these 
tentacula. How much life and active enjoyment on a small 
polypidom ! 
5. Frusrra seracea, Prof. John Meming. 
Hab. Along with Cellipora cervicornis, from deep water, 
Zetland, Fleming. Height two inches; branches linear, of 
an inch in diameter, brittle. 
6. FLustra avicuLaRis, Fan-shaped Sea-Mat, His. 
Hab. Attached to other corallines and old shells, in deep 
water. Peterhead, on /. foliacea and I. truncata, Mr. 
Peach. 
Our first specimens of this pretty little Mustra were 
from Mr. Tudor, of Bootle, attached to F. foliacea; our 
next were found by Miss M‘Leish, on the banks of the 
Dee, below Chester, where 2. foliacea, with this pretty 
parasite, is cast out by the tide and hes withering on the 
shore. It is about an inch in height, fan-shaped, dichoto- 
mous, segments truncate, cells oblong, with pearly capsules. 
7. Frustra Murrayana, Bean. 
Hab. Scarborough, Mr. Bean, very rare; coast of North- 
